Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cac luc » cau luc, coc luc, cac nuoc
doi cua » dai cua, hoi cua
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
di cua » dai cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang x hoi. lieu va cac luc ((va dan) OR (ca dan)) ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang x hoi. lieu va cac luc ((va dan) OR (ca dan)) ((di cua) OR (doi cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang x hoi. lieu va cac luc ((va dan) OR (ca dan)) ((di cua) or (doi cua)) te*".